Improvement in base-burning stoves with central air-passages



2 Sheets--Sheet1.

ELIHU SMITHQv Improvementv in Base-Burning Stoves. n N.126,840,PatentedMay14,1872.

farei/w01" N g@ 1MM 2 Sheets--Shee 2. QEUHU SMITH.

Improvement in Base-Burning Stoves.

No. 126,840, Patented Mai/14,1872,

UNITED i STATES ELIHU SMITH, or ALBANY, Nnw Yoan.

IMPROVEMENT IN BASE-BURNING STDVES WITH CENTRAL AIR-PASSAGES.

Specification forming part of Letters Patent No. 1:26,840, dated May 14,1872.

The nature of this invention consists in the combination, with the baseof a base-burning stove, of avertical flue passing up from an opening inthe base-plate through the ash-pit into a dish of the grate, for thepurpose of conducting cold air from beneath the stove up to near thefire to be heated thereby, and the top of the flue being closed by aremovable cap, when thus heated to be returned into the room frombeneath the base of the stove; it further consists in the combinationwith this hot-air flue and a recessed base of a stove of a dcflector,placed beneath the stove, and used to deect the hot air from the-liuc,and the heat radiated from the base into the room; it further consistsin the combination with this hot-air flue beneath the grate of a hot-airflue passing downward from an 'opening in the top of the stove to andwithin the nre-pot of a loricated pipe, for connecting the lower andupper hotair iiues, to form acontinuous iue through the center of thestove from base to top 5 it further consists in the employment of aperforated pipe encircling the upper hot-air flue, where it w passesthrough the magazine, to keep the fuel therein out of contact with thehot surface of the hot-air liuc, and prevent its ignition at that point;it further consists in such an arrangement of the magazine that it maybe shaken from the outside of `the stove, to feed the fuel to thefire-pot in case it should become bridged7 or choked in such magazine,or in order that the coal already ignited may not be disturbed; itconsists, lastly, in a novel arrangement of ues and dampers forcontrolling the draught.

Figure 1 is a central vertical section. Fig. 2 is a horizontal section.Fig. 3 is a vertical section of the base detached. Fig. 4 is a plan viewof the grate. Fig. 5 is a vertical section of that portion of the stovewhich contains the iire-pot and ash-pit. Fig. 6 is a vertical section,showing the magazine in perspective. Fig. 7 is an elevation of thestove. Fig. 8 is a sectional perspective of the loricated flue.

The same letters of reference are used in all The general outline of thestove is cylindrical, similar to the ordinary base-burning parlorstoves. Its base-plate carries at its circumference adownwardly-projecting annular iiue, I, whereby a circular recess orcavity is formed beneath the base-plate, as clearly shown in Figs. l and3. The annular iiue I is connected with the annular flue J around thefire-pot by the Vertical flue B, which, when the damper D thereon isclosed, causes the hot gases to pass downward into the annular ue I,whence they escape through the pipe E into the chimney. By opening thedamper D a direct draught from the annular flue J to the pipe E isobtained. The lue B is also provided with a damper, C, opposite the,ash-pit H, by opening or closing which the draught from the ashn pitthrough the grate may be modified, and the heated air made to circulatethrough the base-flue. The base-plate has a central opening, which isYcovered by the upwardly-projecting pipe M, which, passing up through anelongated recess in the rear end of the ashdrawer A, rises into a dishor concavity in the under side of the grate G, terminating directlyopposite a central circular aperture therein, its top being closed by adetachable cap, N. This pipe or iiue M conducts the cold air frombeneath the base of the stove to near the burning fuel on the grate, andreturns it in a heated state into the large circular cavity in the base,whence it is diffused into the room through the perforations S S in thebase-plate. The diffusion of this heated air, as well as the heatradiated from the lower and the interior surfaces of the ilue I is mademore perfect by the inverted funnel-shaped deiector R, resting a 'shortdistance above the floor beneath the base of the stove. In arranging thedeflector its short nozzle should be made to coincide with the loweropen end of the tube M, so that hot gases from a stove in an adjoiningor lower room to use my stove as a drum; this aperture is ordinarilyclosed by al suitable plate7 as shown in Fig. 1. The upper portion W ofthe stove forms part of the magazine for the fuel, which passes downthrough the suspended portion F of the magazine and thecombustionchamber L into the nre-pot. The magazine F is hung upon upon aledge on the casing of the stove, in which a horizontal slot, f, is cutfor the introduction of a bar into a suitable pocket or socket on saidmagazine, for shaking the 'latter to agitate the fuel therein, and causeit to feed down into the iire-pot; thus obviating the necessity ofdisturbing the iire or opening the top of the stop to poke the fueldown. A flaring tube, O, is suspended from an opening in the top of thestove through the magazine and combustion-chamber, to and Within thefire-pot, its lower end being closed by a removable cap, P. Within thispipe is a shorter one, Q, of less diameter, through which the air,heated in its passage down between the two tubes, ascends into theroom-the interior pipe Q being open at both ends. That portion of thepipe O passing through the magazine W F is encircled by a perforatedtube, T, to prevent the ignition of the fuel, which might result fromits direct contact with the hot surface of the tube O. U is a lateralflue, to con duct cold air through the combustionchamber into the pipeO. Cold air may also be introduced directly into the combustion-chamberby opening the damper d, which may be of the form shown in Fig. 7, ormay entirely surround that portion of the casin g of the stove,controlling a circula-r series of holes therein. V is a loricated pipe,which is used to connect the lower end of the pipe O, with the upper endof the pipe M--the caps N and 'P beingirst removed-for the purpose offorming a continuous air-flue through the body of the stove from top tobottom, the pipe 0 be ing provided with a suitable damper to con trolthe circulation through such continuous airflue.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, with the base of a stove, of the pipe M, extendingup through the ash-pit to the grate, substantially as and for thepurpose specified.

2. The combination of the recessed base,hot air pipe M, and afunnel-shaped deflector, R, substantially as and for the purpose setforth.

3. The combination, with the recessed base, having the annular flue I,of a deiiector, R, constructed as described, to deflect the heatradiated from the interior and lower surfaces of said annular ue intothe room, substantially as set forth.

4. The combination, with the open-ended pipes or flues M and O, of thecentrally-perforated grate G, and the loricated tube V, substantially asand for the purpose set forth.

5. The combination of the suspended airpipes O and Q, substantially asand 'for the purpose set forth.

6. The combination, With the air-pipe O, of the perforated jacket ortube T, substantially' as and for the purpose set forth.

7. The damper O on the flue B,in combination with a base-Hue,substantially as and for the purpose specified.

8. The opening K in the bottom of the annular flue I, substantially asand for the purpose set forth.

ELIH'U SMITH.

Witnesses:

G. E. VANzANDr, E. A. Ross.

